Ore-feeder



C. C. HAMILL.

ORE FEEDER. APPLICATION FILED MAY?, 1919.

1,343,868. Patented 11111015, 1920.

urinarias-c. 'liar/Linn, fory RANVDSBURG, CALIEQBNIA.

OREJEEDER," l

art of delivering such materials from a bulk supply at a predetermined rate which can be varied at will.

The invention has a peculiar utility as an ore or coal feeder, being used to feed these or similar raw materials at a constant rate to grinding machines, stamp mills, pulverizers, concentrating tables and the like.

Other objects and advantages will be setA forth more at length hereinafter.y

Referring to the drawings, which are for illustrative purposes only,

Figure 1 is a side elevation partly in section of a machine embodying my invention, and

Figy2 is a front elevation of the same ina vention.

The invention is shown in place below the bottom 11 of an ore bin, this ore bin being provided with a hopper 12 through which the ore falls. s

Secured to the bottom 11 is a frame 13 upon which is mounted the bearings for three shafts, namely, the driving shaft 14, the idler shaft 15 and the driven shaft 16. An endless belt or apron 19 passes over belt wheels 17 and 1S carried on theV shafts 15 and 16 respectively, this apron 19passing under the open bottom of the hopper 12.

Rig-idly mounted on the driven shaft 16 is a driven wheel 22. Turning freely on the driven shaft 16 is an arm 23, this arm being provided with a surface 24 which is inclined to the periphery of the wheel 22, a roller 25 being placed between the surface 24 and the wheel 22. A retainer 26 prevents the roller 25 from being entirely dislodged. The arm 23 extends out over a caln 30 which is keyed to the driving shaft 14, this driving shaft being provided with tight and loose pulleys 31 and 32 on which a driving belt'is carried in accordance with standard practice. An, ady justing screw 35 is threaded in a casting 36 carried on the frame 13 and is provided with a locking nut 37. The upper end of the screw 35 extends under the outer end of the i lever 231s governed by the screw 35.

i Spzgica'cifiriY f Lettrsrliateynt f PatentedJune .15, 219,20.,

v Applicationzled Mayx?, 191B. Serial No. 295,504f* f v y l lever-ii-23, rand its downward motion.

Belt adjlustingscrews 4() maybe provided if desired. .H i y Y chute 41 extending under theuedgie of' y' thebeltwheels 17 -delivers the material to any point desired.

The method of operation of the inventionV is as follows:

The driving shaft 14 being turned by means of the pulleys 31 and 32 and the belt (not shown), the cam 30 is rotated, this cam being in such a position that it strikes yagainst and lifts the lever 23 at each revolution. On the up stroke of the lever 23 the roller 25 jams against the wheel 22 locking the lever 23 to this wheel so that the wheel is yadvanced a certain distance due to the movement of the lever 23 which is moved upwardly by the lcam 30. As soon as the cam has turned from its upper position the lever 23 starts to dro and the roller 25 rolls upwardly thus re easin 'the grip 0n the rim of the wheel 22 and a lowing the lever to fall without moving the wheel 22. The amount of downward movement of the adjusting the screw up or down the amount of. forward throw of the lever 23 can be readily varied and the forward movement of the wheel 22 for each rotation of the shaft 14 can be varied. The material falling throu h the hopper 12 on the belt 19 is pulled in t e direction of the arrow A in Fig. 1 and dewheels, a driven wheel rigidly fixed on said i driven shaft, an arm plvoted and turning on said driven shaft, means carried by said arm for engaging and driving said driven wheel vwhen said arm moves in one direction, said means being inoperative when said arm moves in the opposite direction, a cam secured on said driving shaft situated below said arm and lifting it to actuate said driven wheel, a screw threaded in a member fixed to said frame below said arm, the upper end eok 2. An ore feeder comprising a frame, a driven shaft turning 1n bearings mounted on l said frame, an idler shaft turning in bear`-- ings mounted on said frame, a driving shait located between said driven and idler shafts,

turning in bearings mounted on said frame, a belt Wheel rigidly iXed on said driven shaft, a belt wheel on said idler shaft, an endless belt passing around both of said belt Wheels, a driven Wheel rigidly ixed on said driven shaft, an arm pivoted and turning on said driven shaft, means carried by said arm for engaging and driving said driven Wlieel When said arm moves in one direction, said means being inoperative When said arm moves in the opposite direction, a cam secured on said driving shaft situated below said arm and lifting it to actuate said driven Wheel, and means for arresting the down- Ward movement of said arm at various positions.

In testimony whereof, I have hereunto set my hand at Randsburg, California, this 25th day of April, 1919.

' v CHARLES C. .HAMILL 

